Add circular templates for LLAMA detections

To implement this we need to do the following:

• Add example templates to DCC document for P&P review: https://dcc.ligo.org/LIGO-P2300108
• Define the conditions each type should be generated (e.g. a file or label being uploaded to GraceDB?)
• Define the data products unique to LLAMA available, with an example(s) of how to parse.
• Create new compose method compose_llama() that grabs the correct data and use new llama*.jinja2 template files.
• Create at least one example of each using the tools of ligo-followup-advocate to show the new code works properly.

Templates from Zsuzsa:

SUBJECT: Neutrino candidate(s) from joint gravitational-wave and high-energy
neutrino search using LLAMA: low-significance LVK trigger SYYMMDDxx

The IceCube Collaboration ((http://icecube.wisc.edu/) together with the LIGO
Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration
reports:

Searches for track-like muon neutrino events detected by IceCube consistent
with the sky localization of gravitational-wave candidate SYYMMDDxx in a time range
of 1000 seconds [1] centered on the alert event time
(MM/DD/YY HH:MM:SS  UTC to MM/DD/YY HH:MM:SS UTC) have been performed.
During this time period IceCube was collecting good quality data. The hypothesis
test employed by LLAMA uses a Bayesian approach to quantify the joint GW + neutrino
event significance. [2]

1(2,3) track-like event is found in spatial and temporal coincidence with the
gravitational-wave candidate SYYMMDDxx. The event’s properties can be found at
this URL:

https://gracedb.invalid/superevents/SYYMMDDxx

Based on the analysis of gravitational-wave data alone, this candidate does not
meet our criteria for a high-significance public alert.

Properties of the coincident neutrino(s) together with the p-value(s) associated
with the joint observation is(are) shown below. 

dt	ra	dec	Angular Uncertainty(deg)	p-value
-----------------------------------------------------------------------------
xxx.xx	rr.rr	dd.dd		uu.uu         		p.pppp

where:
dt = Time offset (sec) of track event with respect to GW trigger.
Angular uncertainty = Angular uncertainty of track event: the radius of a
Circle representing 90% CL containment by area.
p-value = the p-value for this specific track event from each search.

The IceCube Neutrino Observatory is a cubic-kilometer neutrino detector
operating at the geographic South Pole, Antarctica. The IceCube realtime alert
point of contact can be reached at roc@icecube.wisc.edu

For further information about analysis methodology can be found at
<https://multimessenger.science/>.
The LIGO/Virgo/KAGRA Public Alerts User Guide is available at
<https://emfollow.docs.ligo.org/userguide/>.

[1] Baret et al., Astroparticle Physics 35, 1 (2011)
[2] Bartos et al. arXiv:1810.11467 (2018) and Countryman et
al.arXiv:1901.05486 (2019)

and

SUBJECT: Multimessenger candidate from joint gravitational-wave and high-energy
neutrino search using LLAMA: low-significance LVK trigger SYYMMDDxx associated
with IceCube alert IceCube-YYMMDDA
 
The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA
Collaboration reports:
 
A LLAMA search for LIGO-Virgo-KAGRA gravitational-wave candidate consistent
with the sky localization of IceCube alert IceCube-YYMMDDA (<link to notice>)
in a time range of 1000 seconds [1] centered on the alert event time
(MM/DD/YY HH:MM:SS  UTC to MM/DD/YY HH:MM:SS UTC) have been performed.
The hypothesis test employed by LLAMA uses a Bayesian approach to quantify
the joint GW + neutrino event significance. [2]

Gravitational-wave candidate SYYMMDDxx is found to be in spatial and temporal
coincidence with IceCube-YYMMDDA public alert. The properties of the candidate
event, which based on the analysis of gravitational-wave data alone does not
meet the LIGO/Virgo/KAGRA criteria for a high-significance public alert can
be found at this URL:

https://gracedb.invalid/superevents/SYYMMDDxx

The neutrino trigger time is xxx.xx seconds before(after) the gravitational-wave
candidate event. The p-value associated with the joint observation is 0.00pp.
We encourage further observation of the localization area of IceCube-YYMMDDA
and we provide a joint localization probability map at:

<gracedb link here>

Further information about analysis methodology can be found at
<https://multimessenger.science/>.
The LIGO/Virgo/KAGRA Public Alerts User Guide is available at
<https://emfollow.docs.ligo.org/userguide/>.

[1] Baret et al., Astroparticle Physics 35, 1 (2011)
[2] Bartos et al. Phys. Rev. D 100, 083017 (2019) and Countryman et
al.arXiv:1901.05486 (2019)